Edge protection for fiber boards



Ot; 4, 1932. CARD 1,880,785

EDGE PROTECTION FOR'FI'BER, BOARDS Filed Sept. 2, 1930 P l I W T! II W Jerome T C'arcz.

r wu zyn I Patented Oct. 4, 1932 UNITED STATES PATENT OFFICE CORPORATION, OF

CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE EDGE IROTECTION FOR FIBER BOARDS Application. filed September 2, 1930. Serial No. 479,154.

My invention relates to edge protection for fiber board, particularly such board as is known commercially as Presdwood and formed of disintegrated wood fibers as disclosed in Patent No. 1,578,609 issued March 30th, 1926 to Villiam H. Mason.

.Heretofore the great trouble with the use of material such as has been referred to, where it is exposed to moisture or the like, has been the fraying of the edges, particularly when sheets of stock size are cut down to smaller sizes.

An important object of my invention is to bind and protect the edges of Presdwood or like material against fraying and the access of moisture by applying a coating of metal foil, or a coating of sprayed metal.

Another object isto secure such coating around and adjacent to the edges of the board adhesively by a cementing compound which is waterproof, as for example asphalt cementing compounds.

On the drawing we have illustrated Presdwood or similar boards or panels utilized for building up a sign board.

On the drawing:

Figure 1 is a front elevation of two adjacent panels.

Figure 2 is an enlarged section on plane IIII showing the panels with their reinforcing frame and the joints between the abutting edges of adjacent frames.

Figure 3 is an enlarged front elevation of a corner of one of the panels. Y

Where Presdwood panels or panels of other material or compositions are exposed to the weather, as for example in sign structures, the edges of the panels, unless protected, will be exposed to moisture and will tend to fray and swell. To overcome this I apply to the panels P, before assembly thereof into the desired structure, a coating or binding C of metal foil, and I have found aluminum foil to be very efficient on account of its high degree of flexibility "and tenacity. As best shown in Figure 2 this foil is applied around the edges of the panels and extended a distance inwardly along the sides of the panels, and I preferably secure the foil by adhesion, using preferably some waterproofing adhesive substance A as, for example, some asphalt cementing compound. The panels along their edges will thus be securely bound by the foil and will be protected against fraying and against the ravages of moisture and the weather.

Where the panels are reinforced by frames F, as for example in sign construction, the adjacent edges of the frames may be also coated with foil, as indicated'at B. When adjacent frames are brought together, as by means of arabbeted joint J, the foil B between the frames and the foil binding C on the panels will be brought intimately together to form a seal for excluding moisture and the weather.

It is evident that instead of applying previously formed metal foil to the sheets, the metallic coating or binding might be applied by spraying of the metal in against the sheets along and adjacent to the edges thereof. Before spraying on the metal the surface of the sheets should be suitably prepared to receive and hold the sprayed metal, as by sand blasting or the like.

By use of my invention, panels of Presd wood orother material may be adequately protected along their edges and the weather resistance and the life thereof materially increased.

I claim as follows:

1. A sheet of so-called Presdwood having an edge binding of metal foil intimately secured thereto by adhesion.

2. A panel of so-called Presdwood having its edges and adjacent sections covered by a coating of metal foil.

3. A panel of so-called Presdwood having its edges and adjacent sections covered by a coating of flexible metal foil intimately secured thereto by adhesion.

4. A sheet of fiber board having its edges bound by metal foil secured thereto by adhesion only.

5. A sheet of so-called Presdwood having its edges protected by a comparatively thin coating of metal foil intimately cemented thereto.

6. A sheet formed of disintegrated wood fibers having its edges and adjacent sections a molten state covered by a thin pliable coating of metal foil intimately held thereto by a waterproof cement.

7. A sheet formed of disintegrated wood 5 fibers having its edges bound by a thin pliable coating of metal foil intimately held thereto by an asphalt cementing compound.

In testimony whereof I have hereunto subscribed my name at Chicago, Cook County,

Ill.

- JEROME T. CARD. 

